Researchers in the Pacific Northwest are testing and evaluating a new power storage system that could help store excess electricity generated by the region's many wind farms. The system announced Monday at south-central Washington's Nine Canyon Wind Project includes lithium-ion batteries that can store 500 kilowatt-hours of power — enough energy to meet the demand of about a dozen homes for at least half a day. That's a relatively small amount of power compared with the large amount of electricity produced by the...
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